import axios from 'axios';
import { useUserStore } from '@/store/modules/user';
import { getToken } from '@/utils/auth';
import { tansParams, blobValidate } from '@/utils/honghu';
import cache from '@/plugins/cache';
import { errorCode } from '@/utils/errorCode';
import FileSaver from 'file-saver';
import HttpStatus from '@/enum/RespEnum';
import { getLanguage } from '@/lang';
import { encryptBase64, encryptWithAes, generateAesKey, decryptWithAes, decryptBase64 } from '@/utils/crypto';
import { encrypt, decrypt } from '@/utils/jsencrypt';
import router from '@/router';

const encryptHeader = 'encrypt-key';
let downloadLoadingInstance;
// 是否显示重新登录
export const isRelogin = { show: false };
export const globalHeaders = () => {
	return {
		Authorization: 'Bearer ' + getToken(),
		clientid: import.meta.env.VITE_APP_CLIENT_ID
	};
};

axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8';
axios.defaults.headers['clientid'] = import.meta.env.VITE_APP_CLIENT_ID;
// 创建 axios 实例
const service = axios.create({
	baseURL: import.meta.env.VITE_APP_BASE_API,
	timeout: 50000
});

// 请求拦截器
service.interceptors.request.use(
	(config) => {
		// 对应国际化资源文件后缀
		config.headers['Content-Language'] = getLanguage();

		const isToken = config.headers?.isToken === false;
		// 是否需要防止数据重复提交
		const isRepeatSubmit = config.headers?.repeatSubmit === false;
		// 是否需要加密
		const isEncrypt = config.headers?.isEncrypt === 'true';

		if (getToken() && !isToken) {
			config.headers['Authorization'] = 'Bearer ' + getToken(); // 让每个请求携带自定义token 请根据实际情况自行修改
		}
		// get请求映射params参数
		if (config.method === 'get' && config.params) {
			let url = config.url + '?' + tansParams(config.params);
			url = url.slice(0, -1);
			config.params = {};
			config.url = url;
		}

		if (!isRepeatSubmit && (config.method === 'post' || config.method === 'put')) {
			const requestObj = {
				url: config.url,
				data: typeof config.data === 'object' ? JSON.stringify(config.data) : config.data,
				time: new Date().getTime()
			};
			const sessionObj = cache.session.getJSON('sessionObj');
			if (sessionObj === undefined || sessionObj === null || sessionObj === '') {
				cache.session.setJSON('sessionObj', requestObj);
			} else {
				const s_url = sessionObj.url; // 请求地址
				const s_data = sessionObj.data; // 请求数据
				const s_time = sessionObj.time; // 请求时间
				const interval = 500; // 间隔时间(ms)，小于此时间视为重复提交
				if (s_data === requestObj.data && requestObj.time - s_time < interval && s_url === requestObj.url) {
					const message = '数据正在处理，请勿重复提交';
					console.warn(`[${s_url}]: ` + message);
					return Promise.reject(new Error(message));
				} else {
					cache.session.setJSON('sessionObj', requestObj);
				}
			}
		}
		if (import.meta.env.VITE_APP_ENCRYPT === 'true') {
			// 当开启参数加密
			if (isEncrypt && (config.method === 'post' || config.method === 'put')) {
				// 生成一个 AES 密钥
				const aesKey = generateAesKey();
				config.headers[encryptHeader] = encrypt(encryptBase64(aesKey));
				config.data = typeof config.data === 'object' ? encryptWithAes(JSON.stringify(config.data), aesKey) : encryptWithAes(config.data, aesKey);
			}
		}
		// FormData数据去请求头Content-Type
		if (config.data instanceof FormData) {
			delete config.headers['Content-Type'];
		}
		return config;
	},
	(error) => {
		return Promise.reject(error);
	}
);

// 响应拦截器
service.interceptors.response.use(
	(res) => {
		if (import.meta.env.VITE_APP_ENCRYPT === 'true') {
			// 加密后的 AES 秘钥
			const keyStr = res.headers[encryptHeader];
			// 加密
			if (keyStr != null && keyStr != '') {
				const data = res.data;
				// 请求体 AES 解密
				const base64Str = decrypt(keyStr);
				// base64 解码 得到请求头的 AES 秘钥
				const aesKey = decryptBase64(base64Str.toString());
				// aesKey 解码 data
				const decryptData = decryptWithAes(data, aesKey);
				// 将结果 (得到的是 JSON 字符串) 转为 JSON
				res.data = JSON.parse(decryptData);
			}
		}
		// 未设置状态码则默认成功状态
		const code = res.data.code || HttpStatus.SUCCESS;
		// 获取错误信息
		const msg = errorCode[code] || res.data.msg || errorCode['default'];
		// 二进制数据则直接返回
		if (res.request.responseType === 'blob' || res.request.responseType === 'arraybuffer') {
			return res.data;
		}
		if (code === 401) {
			// prettier-ignore
			if (!isRelogin.show) {
				isRelogin.show = true;
				ElMessageBox.confirm('登录状态已过期，您可以继续留在该页面，或者重新登录', '系统提示', {
					confirmButtonText: '重新登录',
					cancelButtonText: '取消',
					type: 'warning'
				}).then(() => {
					isRelogin.show = false;
					useUserStore().logout().then(() => {
						router.replace({
							path: '/login',
							query: {
								redirect: encodeURIComponent(router.currentRoute.value.fullPath || '/')
							}
						})
					});
				}).catch(() => {
					isRelogin.show = false;
				});
			}
			return Promise.reject('无效的会话，或者会话已过期，请重新登录。');
		} else if (code === HttpStatus.SERVER_ERROR) {
			ElMessage({ message: msg, type: 'error' });
			return Promise.reject(new Error(msg));
		} else if (code === HttpStatus.WARN) {
			ElMessage({ message: msg, type: 'warning' });
			return Promise.reject(new Error(msg));
		} else if (code !== HttpStatus.SUCCESS) {
			ElNotification.error({ title: msg });
			return Promise.reject('error');
		} else {
			return Promise.resolve(res.data);
		}
	},
	(error) => {
		let { message } = error;
		if (message == 'Network Error') {
			message = '后端接口连接异常';
		} else if (message.includes('timeout')) {
			message = '系统接口请求超时';
		} else if (message.includes('Request failed with status code')) {
			message = '系统接口' + message.substr(message.length - 3) + '异常';
		}
		ElMessage({ message: message, type: 'error', duration: 5 * 1000 });
		return Promise.reject(error);
	}
);
// 通用下载方法
export function download (url, params, fileName) {
	downloadLoadingInstance = ElLoading.service({ text: '正在下载数据，请稍候', background: 'rgba(0, 0, 0, 0.7)' });
	// prettier-ignore
	return service.post(url, params, {
		transformRequest: [
			(params) => {
				return tansParams(params);
			}
		],
		headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
		responseType: 'blob'
	}).then(async (resp) => {
		const isLogin = blobValidate(resp);
		if (isLogin) {
			const blob = new Blob([resp]);
			FileSaver.saveAs(blob, fileName);
		} else {
			const blob = new Blob([resp]);
			const resText = await blob.text();
			const rspObj = JSON.parse(resText);
			const errMsg = errorCode[rspObj.code] || rspObj.msg || errorCode['default'];
			ElMessage.error(errMsg);
		}
		downloadLoadingInstance.close();
	}).catch((r) => {
		console.error(r);
		ElMessage.error('下载文件出现错误，请联系管理员！');
		downloadLoadingInstance.close();
	});
}
// 导出 axios 实例
export default service;
